You have chosen 'The Value of Science' by Henri Poincaré, 'Queries to the 'Opticks'' by Isaac Newton and 'Mathematical logic and theory of types' by Bertrand Russell
start again | choose another area for these texts | all the ideas for this combination of texts| All the ideas for Modality, or select a subheading: |
| A. | Necessity | |
| B. | Possibility | |
| C. | Sources of Modality | |
| D. | Knowledge of Modality | |
| E. | Possible worlds |